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Finding the Fourth Proportional to 525,628.80, 788,443.20 and 485,078.40

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Solution

The fourth proportional to 525,628.80, 788,443.20 and 485,078.40 is: 727,617.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,628.80 : 788,443.20 = 485,078.40 : x
  2. Step 2: Convert to fraction form
    525,628.80/788,443.20 = 485,078.40/x
  3. Step 3: Cross multiply
    525,628.80x = 788,443.20 × 485,078.40
  4. Step 4: Simplify right side
    525,628.80x = 382,456,765,946.88
  5. Step 5: Solve for x
    x = 382,456,765,946.88/525,628.80
  6. Step 6: Final answer
    x = 727,617.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.